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International Conference on Fuzzy systems and Knowledge Discovery (FSKD)

作者： Yalin Zheng Guang Yang Jing Zheng Jinsheng Xing State Key Laboratory for Intelligent Technology and Systems Department of Automation Faculty of Information Science and Technology Tsinghua University Beijing China Research Center of Intelligent Information Technology Department of Computer Science and Technology Faculty of Software Dongguan University of Science and Technology Dongguan China Research Center of Dongguan Economy Department of Economy and Commerce Dongguan University of Science and Technology Dongguan China Faculty of Mathematics and Computer Science Shanxi Normal University Linfen China Research Center of System Engineering Faculty of Electronic and Information Engineering Xi'an Jiaotong University Xi'an China

In this paper, we propose the basic framework of point- wise topological logic on completely distributive lattices and explore approximate reasoning in it. The logic of this paper is based on pointwise characterization, therefore the pointwise conception is pervasive. We explore approximate reasoning in abstract logical framework Fl on completely distributive lattice L. We propose the structure of point- wise topological logic F TL , the structure of matching function sigma. and the structure of matching neighborhood group. We investigate approximate reasoning in pointwise topological logic F TL with matching function sigma, develop pointwise topological algorithm of simple approximate reasoning, introduce the essential characteristics of this scheme.

关键词： Lattices Fuzzy logic Computer science Knowledge engineering Fuzzy systems Information technology Laboratories intelligent systems Automation Information science

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Teach and playback of realistic target reaching movement of virtual human upper limb

Teach and playback of realistic target reaching movement of ...

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3rd International Conference on Autonomic and Autonomous systems, ICAS 2007

作者： Na, Meng Ding, Li Jia, Peifa State Key Laboratory of Intelligent Technology and System Department of Computer Science and Technology Tsinghua University Beijing 100084 China

ISBN: (纸本)076952799X

The significant research objective of virtual human is to generate realistic movement like real-life person. For the most frequent daily activity of target reaching movement of human upper limb, teach and playback method is proposed to generate vivid human motion, which combines respective merits of parametric keyframe, kinematics, dynamics, and motion capture methods together. First, the tip trajectory and velocity rules are learned and estimated by a weighted least squares support vector machine (WLS-SVM) and a combined half-Gaussians model respectively. Then an inverse kinematic method with dynamic constraint, damped least squares (DLS), is used to calculate the joint angles of the upper limb. Finally, the experimental results show that once the target position is appointed, the 3D virtual human skeleton model can generate realistic reaching movement. © 2007 IEEE.

关键词： Inverse kinematics

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Modeling and application of railway safety system through object petri nets

Modeling and application of railway safety system through ob...

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International MultiConference of Engineers and Computer Scientists 2007, IMECS 2007

作者： Ye, Zhang Jia, Limin Cai, Guoqiang Beijing Jiaotong University State Key Laboratory of Rail Traffic Control and Safety Beijing China Research Center for Intelligent System and Safety Technologies State Key Laboratory of Rail Traffic Control and Safety China

ISBN: (纸本)9789889867171

The management of railway safety system needs extended and integrated approaches of behavioral characteristics modeling. While most formal approaches to railway safety system modeling consider only the control-flow perspective, it is essential in a function-resource organizational context to link tasks. This paper presents the railway safety process models into a special type of object Petri nets called Petri Net with Object (PNO). The benefit of our approach is that by using PNO, the control-flow and the inter-organizational perspective can be integrated into a unique small scale, flexibility, and modularization formalism ready to be analyzed and application. Examples show these contributions.

关键词： Petri nets

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Research on rough set theory and applications in China

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Lecture Notes in Computer Science

作者： Wang, Guoyin Zhang, Qinghua Huang, Houkuan Ye, Dongyi Hu, Qinghua Hu, Xuegang Shi, Zhongzhi Li, Yongli Shang, Lin An, Liping Sai, Ying Chen, Shanben Liang, Jiye Qin, keyun Zeng, Huanglin Xie, Keming Miao, Duoqian Min, Fan Wu, Zhaocong Wu, Weizhi Dai, Jianhua Institute of Computer Science and Technology Chongqing University of Posts and Telecommunications Chongqing 400065 China School of Information Science and Technology Southwest Jiaotong University Chengdu 610031 China School of Computer and Information Technology Beijing Jiaotong University Beijing 100044 China College of Math. and Computer Fuzhou University Fuzhou 350002 China Harbin Institute of Technology PO Box 458 Harbin 150006 China School of Computer and Information Hefei University of Technology Hefei 230009 China Institute of Computing Technology Chinese Academy of Sciences Beijing 100080 China Lanzhou University No.222 Tianshui South Rd. Lanzhou 730000 China State Key Laboratory for Novel Software Technology Nanjing University Nanjing 210093 China Management Science and Engineering Department Business School Nankai University Tianjin 300071 China Shandong University of Finance No.40 Shun-geng Road Jinan 250014 China Welding Engineering Institute Shanghai Jiaotong University Shanghai 200030 China School of Computer and Information Technology Shanxi University Taiyuan 030006 China Intelligent Control Development Center Southwest Jiaotong University Chengdu 610031 China Artificial Intelligence of Key Laboratory Sichuan University of Science and Engineering Zigong 643000 China Department of Automation College of Information Engineering Taiyuan University of Technology Taiyuan 030024 China 4800 CaoAn Highway Shanghai 201804 China School of Computer Science and Technology University of Electronic Science and Technology of China Chengdu 610054 China School of Remote Sensing Information Engineering Wuhan University Wuhan 430079 China Institute for Information and System Sciences Faculty of Science Xi'an Jiaotong University Xi'an 710049 China Information College Zhejiang Ocean University Zhejiang 316004 China Institute of Artificial Intelligence Zhejiang University Hangzhou 310027 China

ISBN: (纸本)3540850635

This article gives a capsule view of research on rough set theory and applications ongoing at universities and laboratories in China. Included in this capsule view of rough set research is a brief description of the following things: Chinese research groups on rough set with their URLs for web pages, names of principal researchers (supervisors), numbers of graduate students, and topics being investigated. Statistical summaries showing the growth in the research on rough set theory and application in China are included. In addition, an introduction summarizing the research interests of Chinese researchers is included in this article. The contribution of this article is a complete overview of the principal research directions in rough set theory and its applications in China. © 2008 Springer-Verlag Berlin Heidelberg.

关键词： Rough set theory

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Teach and Playback of Realistic Target Reaching Movement of Virtual Human Upper Limb

Teach and Playback of Realistic Target Reaching Movement of ...

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International Conference on Autonomic and Autonomous systems (ICAS)

作者： Meng Na Li Ding Peifa Jia State Key Laboratory of Intelligent Technology and System Department of Computer Science and Technology Tsinghua University Beijing China

关键词： Humans Joints Kinematics Skeleton Motion control Motion analysis Mathematics Laboratories intelligent systems Computer science

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Dynamic Surface Control for Hypersonic Aircraft Using Fuzzy Logic system

Dynamic Surface Control for Hypersonic Aircraft Using Fuzzy ...

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2007 IEEE International Conference on Automation and Lofistics

作者： DaoXiang Gao ZengQi Sun TianRong Du State Key Laboratory of Intelligent Technology and System Department of Computer Science and Technology Tsinghua University Beijing 100084 China

ISBN: (纸本)9781424415304;1424415306

An adaptive fuzzy control strategy is proposed for the hypersonic aircraft. Fuzzy logic system is used to compensate the unknown nonlinearities and modeling errors caused by changes of flight conditions. The DSC method eliminates the "explosion of terms" inherent existing in the conventional back-stepping method. Stability analysis shows that the control law can guarantee the semi-globally uniform boundedness of the solution of the closed-loop system. Numerical simulation use the longitudinal model of a hypersonic aircraft to demonstrate the effectiveness of the proposed strategy.

关键词： Back-stepping Dynamic surface control Adaptive fuzzy control Flight control Hypersonic aircraft

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Travel time prediction algorithm based on neural network and data fusion

Travel time prediction algorithm based on neural network and...

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14th World Congress on intelligent Transport systems, ITS 2007

作者： Zhang, Kun Chen, Dewang Guan, Jizhen School of Electronics and Information Engineering Beijing Jiaotong University Beijing 100044 China State Key Laboratory of Rail Traffic Control and Safety Beijing Jiaotong University Beijing 10044 China Beijing STONE Intelligent Transportation System Integration Co. LTD. Beijing 100081 China

ISBN: (纸本)9781617387777

Current travel time prediction algorithms often need large numbers of travel time data, which are difficult to gain and highly cost, to identify the algorithms' parameters. In this paper, we propose new travel time prediction algorithms, which use neural network to predict future speed dynamically, and use data fusion to integrate the speed data of different detectors and, to calculate the travel time. Vehicle plate recognition technology is used to collect the real travel time of the test section on Beijing Third-Ring freeway to evaluate the algorithms. From the obtained results, the average prediction error is less than 10%.

关键词： Forecasting

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Robust Tracking Control of a Three-DOF Planar Under-actuated Manipulator

Robust Tracking Control of a Three-DOF Planar Under-actuated...

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International Conference on Control and Automation (ICCA)

作者： Licheng Wu Shengping Liu Zhen Lu State Key Laboratory of Intelligent Technology and System Tsinghua University Beijing China School of Automation Science and Electrical Engineering Beijing Aeronautics and Astronautics University Beijing China

A manipulator with free joints is a class of under-actuated mechanisms. Control of such systems is one of major topics in robotics and control engineering. In this paper, we develop a nonlinear feedback controller to force a three-dof planar under-actuated manipulator affected by smooth, bounded uncertainties to globally asymptotically track a reference trajectory. This under-actuated manipulator moving in a horizontal plane has two prismatic actuated joints and one revolute free joint. The control development is based on some coordinate transformations, Lyapunov's direct method and popular integrator backstepping technique. Numerical simulations are presented that demonstrate the effectiveness of the controller.

关键词： Robust control Manipulators Control systems Robot kinematics Control engineering Adaptive control Force control Force feedback Uncertainty Trajectory

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Terrain Identification for Prosthetic Knees Based on Electromyographic Signal Features

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Tsinghua Science and Technology 2006年第1期11卷 74-79页

作者：金德闻杨建坤张瑞红王人成张济川 Division of Intelligent and Biomechanical System State Key Laboratory of Tribology Department of Precision Instruments and Mechanology Tsinghua UniversityBeijing 100084 China

The features of electromyographic （EMG） signals were investigated while people walking on different terrains, including up and down slopes, up and down stairs, and during level walking at different speeds, The features were used to develop a terrain identification method. The technology can be used to develop an intelligent transfemoral prosthetic limb with terrain identification capability, The EMG signals from 8 hip muscles of 13 healthy persons were recorded as they walked on the different terrains. The signals from the sound side of a transfemoral amputee were also recorded. The features of these signals were obtained using data processing techniques with an identification process developed for the identification of the terrain type. The procedure was simplified by using only the signals from three muscles. The identification process worked well in an intelligent prosthetic knee in a laboratory setting.

关键词： rehabilitation engineering terrain identification electromyographic （EMG） signal analysis prosthetic knees

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Reconstructing a three-dimensional P-GMAW weld pool shape from a two-dimensional visual image

Reconstructing a three-dimensional P-GMAW weld pool shape fr...

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作者： Guangjun, Zhang Zhihong, Yan Lin, Wu Robotic and Intelligent Weld Group State Key Laboratory of Advanced Welding Production Technology Harbin Institute of Technology Harbin 150001 China

The online detection of the three-dimensional (3D) shape of a weld pool is a key unsolved question for weld shape control. In this paper, a method to reconstruct the 3D shape of a weld pool boundary from a two-dimensional (2D) visual image is proposed. Firstly, a new 3D model was developed to describe the weld pool geometry in pulsed gas metal arc welding (P-GMAW). In this model, four parameters could be used to determine the weld pool shape: the maximum width W, the length of the pool tail L, the height of the rear of the pool H and the projection of the rear angle onto the work piece planeL. Then, the clear weld pool images from the P-GMAW were captured from the upper side, and a series of algorithms were developed to extract the model geometrical parameters from these images. Finally, the 3D shape of the weld pool was reconstructed from the 2D images. The results were then validated with metallograph observations. The measurement error of this method was investigated, and methods for improvement were discussed. © 2006 IOP Publishing Ltd.

关键词： Welding

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